Internal gear drive



Feb. 28, 1933.

fordrill spindles and it has for an 'obj ect to provide an improved drive capable Patented; F eb; 28, 1933 i DAVID c..-xLAUs EYE R,- DECEASED, LA'rE, on onvomnarij orno; BYI H. HENRY SUN nxncu'ron, or (CINCINNATI, omo, :Assmnon TO mun cmcmnan 310x :DERMANN,

" Tonnroo'n COMPANY; oroincmnarnonropa LCQR-POBI-ATIONI'OF om KLINTERNAI} D IVE l i ariam meane ember 19 ,19 s11]. v swam, 552,012.}

This inventionrelatesto driving, mechaof being embodied in adrill head and which Will afford a'icon'siderable number of speed changes covering a wide range of gear ratios.

Heretofore it has found that slow speeds readily and advantageously may be 'transmited to aidrilljspindle from a rapidly rotating drive shaft, without increasing the gears to an objectionable size; by mounting a relatively large internal gear coaxially -with the drill, spindles and idrivingthe internal gear .by a relatively small pinion. This construction is advantageous in that it places the final drive shaft close to the spindle'thereby makingthe construction compact and yet pro viding a great reduction in speed between ternalgear. .o. r p p I The constructionsofthis" nature, as heretofore provided, have, however, ha dfserious limitations in that they have been capable of affording only about four speeds rotation the driving pinionf and' th low; speed v in the spi'ndle froma single speed the main drive shaft;v The present inventionprovides a construction Which,1 although utilizingonly three "shaft axes, provides; as manyas' nine spindlespeeds from a single speed ih the arm shaft. V 7

Not only does, the present improved;con-,

Istruction afl'ord agreater number anda more varied ratio" offslow spindle speeds but it provides, in addition, speed increases whereby the tool spindle maybe caused to rotate materially fasterthan :the main drive shaft;

Stated more specifically",v the "present con 1 struction provides a plurality of: spindle speeds from a single speed'in'the drive shaft varying from, a24to '1 speedreduction to a 1 to 2 speedincrease, all of which is accom plished bythe provision of a relatively small number of gears and I clutches arranged on only three parallel axes;

s The s mproved" construction preferably comprises two serially arranged sets of speed change gearsintermediate the drive shaft and" the tool spindle. Thefirst gear set'afiords' three speeds between the first driven shaft and hereinafter will be described;

first gear, set the second driven shaft may be f driven at'substantially the same rate asthe i drive shaft and the first driven shaft or at two materially reduced rates. j i

" The second change gear set; which modifies I p the speeds provided by the first gear set',com-

prises three pairs of'complemental driving and driven gears" adapted selectively to be a rendered effective 'to rotate the spindle driv gears are rotatably journaled The other driven gear is splin'ed' .to the spindle sleeve ingsleeve upon Which'two of the three driven and carri'esclutch meanslfor selectively locks ing either of thelother two driven gears to the spindle sleeve: Q The second gear set includes arelativelysmall driving pinion fixed i tofthe second "driven shaft and relatively large internal gearrotatably j ournaled on the spindle driving sleeve and permanently meshingwith the small pinion. It isthrough this pinion and internal gear connection that the extremely slow: speeds are transmitted to the spindle sleevei Th's inventionalso contemplates the'pm .vision of amodified eonstruction which ad vantageously maybe employed when no inereases inspeed are required; This modified construction jvvhichaflordssix' speeds of rotation in the spindle' froma single speed inthe speed reductions is disclosed in the [Other objects and advantages-will and in part rendered apparent therefrom in connection with the annexeddrawings;

; To enable Othe s skilled in the art so fully ,part indicated in the followingdescription W to apprehend the underlying features hereof that they may embody the: same in thevari 'ous'w'ay's contemplated by' this invention;

drawings depicting a preferred typical consft ruction have been annexed as apart ofthis diselosure and, in such' drawings, like c'ha'r ac are of reference Idenote correspondin'g parts throughout all" the yiews, of yvhieh ld i'gure l; isfa were al sectional view illii s tratin'g" one embodiment of' the" improved spindle six speeds of rotation from a drive shaft 1, which conveniently may be the usual arm shaft of a radial drill. In the upper portion of the head, there is journaled a spindle driving sleeve S Within which is splined, for axial movement, the usual tool spindle T. As hereinbefore stated, this invention is directed to the provision of means for giving to the spindle sleeve, and thereby the spindle, a considerable number of speeds of rotation, covering a wide range, from a single speed inthe drive shaft.

This has been accomplished, as shown in Fig. 1, by the provision of two serially arranged speed change devices designated generally as A and B. Each of these speed change devices affords three speeds, thereby rendering available nine speeds in the s in dle from a single speed in the drive sha t L Within the head H, transverse to the shaft 1, there is .journaled a shaft 2 to which is secured. a'bevel gear 3. This gear is'permanently in mesh, at its opposite sides, with similar gears 4 (onlyone of which is shown) adapted, upon the actuation of a suitable reversing clutch of which the shifter is shown at 5, selectively to be driven by the shaft 1. Alternate clutching ofthe gears 4 to the drive shaft will effect forward and reverse rotation of the gear 3 and shaft 2 in amanner common to radial drills.

A third Shaft 6 also is journaled in the drill head parallel to the shaft 2 and the spindle T and this shaft isadaptedto be driven se lectively at any one of three speeds fromthe shaft2as now'will be described. -A ar 7 is rotatably journaled aboutthe shaft 2 on a bushing b and has formed integralwith, it clutch teeth 7". Splined. to the'shaft 2 is a shiftable gear-unit 8 having gears 8 and 8 and clutch teeth 8 complemental to the gear-unit 9 keyed to the shaft 6. In another position of thegear-unit 8 the gear 8 thereof engagesand drives a gear 1O forming a part of a second geanunit 1O keyed to the shaft 6. When the gear-unit 8 is shifted toits lowermost position the clutch teeth 8 thereof enspeed change device whereby threespeeds of rotation are transmitted to the shaft 6 from a single speed in the drive shaft 1.

The I second speed. change device which "triples the speeds available in the shaft 6,

Will now be described. Rotatably journaled on the spindle sleeve S is a large internal gear permanently in mesh with a small driving pinion 12 fixed toshaft 6. Means, later to be described, is' provided for selectively clutching the gear 11 to the spindle sleeve, whereby three speeds may be transmitted from the shaft 6 to the spindle drive sleeve and thereby to the spindle. The gear 10 on the gear unit 10 servesas a driverfor a complemental gear llirotatably journaled onthe spindle sleeve and when this latter gear is clutched to the sleeve three'more speeds are transmitted to the sleeve and spindle. Three additional speeds are transmitted from the shaft 6 to the spindle sleeve by a gear 10, forming a part of the gear-unit 10, meshing with a gear 12 provided by. a combined gear and clutch element 12 splined to the sleeve S. The member12 is provided with clutch teeth 12 adapted to engage clutch teeth 11 integral with the gear 11, and with clutch teeth 12 adapted to engage clutch teeth 11 provided by the internal gear 11. 7 By engagement of these clutch teeth the gears 11 and 11 selec tively ma becaused to rotate the spindle sleeve. or convenience of manufacture the clutch teethll are preferably formed on a cup member 13 suitably secured to the internalgeanll, such, for. example, as by screws 14. one only of'which is shown.

The ratios of the driving pinion 12 and the driving-gears 10" and .10 to the driven gears 11, 11 and 12 are such that together with the ratios of the driving and driven. gears of of the change speed mechanism A, the spindle may be driven at any one of ninespeeds varying from approximatelytwice the speed of the drive shaft 1 to approximately one twenty-fourth of the speedthereof.

Fig. 2 shows a modified construction which maybe advantageous in machines wherein the rateofrotation of the spindle is not reduired to be greater. than that of the main (.rive shaft; This'construction is similar to that above described in that it includes the head Hg-the main drive shaftl extending therethrough; the main driving and driven gears 4 and'3, respectively, the reversing clutchwith its shifter 5; the spindle rotat I one endwit-hina bearing 72- p'rovided. by the head H andat the other endin a bushing it ing sleeve. upper end, a series of clutch teeth 24 adapting sleeve S journaled in the head ,the large internal'gear 11 rotatablyjournaled on the sleeve, and the tool spindle Tisplined within the sleeve and aXi-ally movable therein, Like the preferred form, this modified construction provides a first three speed speed-change device, but it differs from the preferred form in that the second speed-change device affords only two speed changes instead of the three speed device of the former. Thus with the modified construction six speeds are transmitted to the spindle from a single speed in'the drive shaft 1. v v,

In the modified construction the gear 3 is fixed upon a sleeve 15 rotatably journaled in a bearing boss 15 provided-by the tool head. The upper end of'theisleeve carries agear 16 and a series of clutch teeth 16". The gear 16Imeshes with and drives a gear 17 form-' within the sleeve 15' is a shaft" 20. e To this shaft is splined a combined gear and clutch r 35- member 19 formed intermediate its ends with a gear 19 adapted to be meshed with the gear 17". At its lower end the member-19 is provided with clutch teeth 19 adapted, in the lowermost position of the member, to engage the clutch teeth 16 on the gear 16 thereby transmitting a 1"to 1 direct drive from the sleeve 15 to the shaft20. About the shaft 20, and within a bearing boss h provided by the drill head, is rotatably journaled the hub 21 of a gear 21 which is p-erman-ently in mesh with and driven by the gears'17. The lower end of this hub formed with clutch teeth 21 adapted tob'e engaged by complementa-l clutch teeth 19 on;

the element 19 thereby to cause the gear 21 to transmit rotation to the shaftQO. The foregoing described the means for selectively transmitting to the shaft'20 any one of three speeds from the shaft 1.

Fixed to the shaft 20 is a pinion 12 permanently in mesh with the internal gear 11, anda gear 22 adapted to be engaged by a gear 23 provided by a combined gear and clutch member 24 splined to the spindle driv- The member 2a "carries, at. its

ed, by shifting the member, to be engaged with complemental clutch teeth 11 carried by the gear 11. Thus by selectively shifting the member 24 downwardly three speeds of rotation may be transmitted to the spindle driving sleeve through the gea-rs'22 and 23 and by shifting it upwardly to engage the clutch teeth 24: and ll three more speeds ilnay be transmitted to the sleeve by the gear 1 l 3 i The ratio of the driving and driven gears is such that the six speeds transmitted to the spindle may vary from approximately the speed of "the drive shaft to approximately one twenty-fourth of that speed. i

Without further analysis, the. foregoing Wlll so fully reveal the gist of thisinvention that others can, by applying currentlmowledge, readily adapt it, for various utilizations by retainmgone or more ofthe features that, from the standpointof the prior art, fairly constitute essential characteristics of either the generic-or specific aspects of this invention and, therefore,snch adaptations should be, and are intended to be,

comprehended within the meaning and range e of equivalency of the following claims;

Having thus revealed this inventlon," I claim as new and desire to secure the following combinations and elements, or equiva lents thereof, byLettersPatentof United States:-r 1 i 1. A spindle driving transmission for drilling machines comprising a' drive shaft; a second shaft arranged With its aXistran'sverse to the axis of thedrive shaft and driven thereby; a first gear .rota-tably journaled on said'second shaft; a third shaft journ-aled parallel to the second shaft; four gears and a pinion'fiXed to rotate with said third shaft,

one of said gears being permanentlyin mesh with the-gear journaled on the second shaft; a gear unit providing second and third gears splined on said second shaft and adapted selectively to be meshed with predetermined ones offthe gears on the third shaft; means selectively to clutch said gear "unit to'said first gear to; cause the latter to bekrotated; i

a spindle drive sleeve ournaled parallel with said third shaft; 'a', spindle splined within the sleeveta large internal gear rotatably journaled on said sleeve and, meshing with said pinion a second gearjournaledon. said i sleeve and meshing; with one'of the gears on, the third shaft; and acombined clutch and gear member splined to said sleeve and adapted in one position to clutch said internal gearto the sleeve, in another position to clutchsaid second gear to thesleeve and in a third position, to mesh the gear thereon;

with oneof-the gears on the third shaft.

2. A spindle drive mechanism for machine tools comprising a drive, shaft; a rota-table spindle-driving sleeve a relatively large in ternal gear journaled on said sleeve; aelutch member carried by said internal gear; a second gear rotatably journaled on said sleeve; a clutch member carried by; said secondgear;

a rotatable haft'arranged parallel with said sleeve and driven from said drive shaft; two driving gears and a pinion secured thereto, said pinion being meshed with said internal gear and another of said gears being permanently meshed with said second gear; a gear splined to said sleeve and adapted to be shifted to an intermediate position into mesh with oneof-the gears on said rotatable shaft; clutch elements carried by said splined gear and adapted in one position thereof to clutch said internal gear to said sleeve and in another position to clutch said second gear to said sleeve.

3. In a drilling machine, in combination, a spindle driving sleeve, an internal gear and an external gear rotatably journaled on said sleeve, a combined gear and clutch element splined to said sleeve, multiple speed gearing arranged for operative connection with said sleeve selectively through said internal gear, said external ear and said splined gear, for selectively e ecting relatively slow, fast, and intermediate speeds of rotation in said sleeve, said combined gear and clutch element being shiftable selectively into clutching engagement with said internal and external gear and into driving mesh with a gear of said multiple speed gearing.

4. In a drilling machine, in combination, a drive shaft; a spindle driving sleeve; a plurality of serially arranged speed change devices for rotating said sleeve at any one of more than live speeds from a single speed in the drive shaft, said speed change devices each including shiftable and non-shiftable driving and driven elements adapted selectively to be engaged, one of said speed change devices comprising two driven gears, each provided with a clutch element, rotatably journaled' on said sleeve, one of said gears being an internal gear, and a combined gear and clutch element splined to said sleeve, three driving gears two of which are permanently in mesh with said two gears rotatably mounted on the sleeve,-said combined gear and clutch element being shiftable selectively to clutch either of said two driven gears to said sleeve or to engage the gear thereof with the third of said driving gears.

'5. I11 a drilling machine, in combination, a drive shaft, a first multiple speed transmission for multiplying the speeds available in said drive shaft, a spindle driving sleeve, a second multiple speed transmission adapted to receive the speeds produced by the first multiple speed transmission, said second transmission comprising an internal gear and an external gear rotatably journaled on said sleeve, a'combined gear and clutch element splined to said sleeve, multiple speed gearing arranged for operative connection with said sleeve selectively through said internal gear, said external gear and said splined gear, for selectively effecting relatively slow, fast, and intermediate speeds of rotation in said sleeve, said combined gear and clutch element being shiftable selectively into clutching engagement with said internal and externalgear and into driving mesh with a gear of said multiple speed gearing.

6. In a drillingmachine, in combination, a drive shaft; a second shaft driven thereby; a first gear rotatably j ournaled 011 said second shaft; a third shaft; four gears and a pinion fixed to rotate with said third shaft, one of said gears being permanently in mesh with the gear journaled on the second shaft; a gear unit providing second and third gears splined on said second shaft and adapted selectively to be meshed with predetermined ones of the gears on the third shaft; means selectively-to clutch said gear unit to said first gear to cause the latter to be rotated; a spindle drive sleeve; a spindle splined within the sleeve; a large internal gear rotatably journaled on said sleeve and meshing with said pinion a second gear journaled on said sleeve and meshing with one of the gears on the third shaft; and a member splined to said sleeve and provided at its opposite ends with clutch portions and intermediate its ends with a gear, said member being adapted in one position to clutch said internal gear to the sleeve, in another position to clutch said second gearto the sleeve and in a third position to mesh the gear thereon with one of the gears on the third shaft;

In witness whereof, I have hereunto subscribed my name.

H. HENRY SUNDERMANN,

Executor of the Last Will and Testament of David 0. Klausmeyer, Deceased. 

